Cement



NIIED STATES CEMENT.

SPECIFICATION forming part of Letters Patent No. 363,402, dated Mia}; 24, 1887.

Application filed February 15,1887. Serial No. 227,740. (No specimens.)

nnslaked lime, two hundred parts, by measure;

kainit, twenty parts, by measure; acetate of lime, five parts, by measure; river or any other fine sand, three times the quantityof thelime. These ingredients are heaped up in a pile, and sufficient water added to turn the lime into a dry hydrate, The mass is then thoroughly 20 mixed and sifted, after which it is ready to be barreled up and sold, to be used in the same manner as other cement. The kainit is a natural product which contains sulphate 0f potassa, sulphate of magnesia, and other salts, which, together with the acetate of lime, I 25 have found have a great attraction for caustic lime, and give to it hardening properties.

I do not confine myself strictly to the proportions given, as the richer the lime the more kainit and acetate of lime is required. 30

XVhat I claim, and desire to secure by Letters Patent of the United States, is

The herein-described cement, composed of lime, kainit, acetate of'lime, and river or any other fine sand, substantially as set forth.

ISAAC LIGHTENTAG.

Witnesses:

MARTIN E. DORIOOOURT, CHARLES RUIssER. 

